I am still working on this web service part. What i figured out is there are two ways to achieve this.
1) use KSOAP2
2) using JSR172 api

I am working with JSR172 and for that i have created a WSDL file using Axis2 in eclipse and also generated the stub client using wireless toolkit but now when i am invoking that client in my BB code it is giving me JAXRPC Exception.
I dont know why it is giving me that exception.

Anybody who can help me regarding this exception will be a great help or atleast let me know where i am doing wrong